Suitcase



FIG. 1 is a front elevational view of a suitcase, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof taken from the left side of FIG. 4; and

FIG. 6 is a side elevational view thereof taken from the right side of FIG. 4. 

The ornamental design for a suitcase, substantially as shown and described. 